"The scientific process of asking questions and seeking answers serves as the foundation of the Institute for Inquiry®. The Institute provides a variety of workshops, forums, and resources to support an international community of scientists and educators dedicated to developing innovation and leadership in science education." This website includes self-directed workshops for educators to work through.
The interest in inquiry-based learning seems to ebb and flow based on-well, it's not clear why it ever ebbs. In short, it is a student-centered, Constructivist approach to learning that requires critical thinking, and benefits from technology, collaboration, resourcefulness, and other modern learning skills that never seem to fall out of favor themselves.